THS4531 Datasheet, PDF (36/55 Pages) Texas Instruments – Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier

THS4531
SLOS358B – SEPTEMBER 2011 – REVISED MARCH 2012
R_G
V_IN–
100 pF
From Analyzer
0.22 μF
R_G
V_IN+
100 pF
R_F
10
V_S+
+
V_OCM
–
THS4531
V_OUT–
To Analyzer
10
V_OUT+
R_F
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Figure 80. THS4531 Audio Analyzer Test Circuit
−95
−97
−99
−101
−103
−105
−107
−109
−111
−113
−115
0
No Weighting
A−Weighting
V_S = 5 V
G = 1 V/V
V_OUT = 1 V_RMS
R_F = 2 kΩ
R_L = 600 Ω
5k
10k
15k
20k
24k
Frequency (Hz)
G070
Figure 81. THD+N on Audio Analyzer, 10 Hz to 24 kHz
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
0
V_S = 5 V
G = 1 V/V
V_OUT = 1 V_RMS
R_F = 2 kΩ
R_L = 600 Ω
5k
10k
15k
20k
24k
Frequency (Hz)
G071
Figure 82. 1kHz FFT Plot on Audio Analyzer
36
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